Definitely squeeze preflop with JJ IP when there is a huge fish. Flop is pretty meh... The fish has plenty of 7x in his range, and the original raiser is only continuing with OP or possibly the NFD. Problem is that a fish could easily be doing this with 9x so think it's a bit closer in terms of whether to fold or not. However, I think I probably fold just because UTG may come back over the top and making a smaller mistake here is better than making much larger ones on the turn and river.